Determination of straightness error using autocollimator

[@nohinsalve5367]

Good explanation 👍🏻

[@srivathsaankarunakaran3237]

Very good thanks sir

[@dhanishp.b6658]

0:12 Definition of straightness is incorrect!

[@niyatisrivastava4-yearb.te820]

Thank you

[@MatthewRulla]

Scary technique! Wow, if H&W engineer's were to see this video, their heads would explode. I can't believe how many inaccuracies were introduced with such poor metrology technique.